Process of purifying oily materials.



P. SOEUCK, OF PORTLAND. OBE GON, ASSIGNOR TO SUPERIOR OIL AND PROCESS COMPANY, OF PORTLAND, OREGON, A CORPORATION.

PROCESS OF PUBIFYING OILY MATERIALS.

rename.

Ho Drawing.

To all whom it may concern Be it known that I, WALTER P. Sermon, a

State of Ore on, have invented certain new and useful mprovements 1n Processes of Purifying Oily Materials, of which the fol- 'lowing is a specification.

"production of a The object of my present invention is the recess capable of reach] economically purifying and deodorizin oi s,

. liberation of free acids and the like.

also found that there isa certain amount of When the process is carried out in suc and thereby improving the same, an this purifying and deodorizmg ma be complete, or may be carried on to any esired extent.

Briefi stated, m process consists in distilling rom the oi in a current of hydrogen, those lmpurlties which produce foul odors in the oil, or produce disagreeable fia-- vors therein, or are particularly liable to undergo fermentative decomposition w1thI tthe 1s hydrogenation of the oil takingplaceileven vessels as lass, which; so far as I have been able to f ind out, are not capableof catalytically effecting the union of hydrogen with the said oils. u 1 Without limitin myself to the recise details, I give the 0 lowin examp es, for the purpose of more fully escriibmg-and explaining the invention.

Emamplegi .Castor oil is heated to a temperature of about 185 C., and a moderately strong current of hydrogen gas is bubble throu h the some while the oil is held at the state temperature. After a eriod of one to one-andone-half hours it 1s found that the highly disagreeable odor and flavor of the oil has been removed, and a product remains which has a pleasant nutty odor. The iodin number of the oil will be found to have been re duced somewhat, and the product can be kept for a long time without getting rancid. The color is not changed.

Example 2.

Eel oil, heated to about 300 (Land hydrogen passed through, has its fishy odor and vile taste removed, by the passage of hydrogen therethrough, in one to two hours.

Specification)! Letters intent. Application filed August 81, 1916. Serial no. 117,888.

Patented Mar. 19, 918.

The color is changed from reddish to golden yelllow. It may then be used as a cooking 01 I Ewample 3.

God liver oil, treated at about 300 C. for one and one-half hours, likewise loses its odor and flavor. A sample so treated in a glass vessel, with a lass tube was used for the introduction of t e hydrogen, was found to have its iodin number reduced from 154 to 109 in 1% hours. Its color is unchanged.

Example 4.

Corn oil extracted by the naphtha proeess, has a decidedly disagreeable odorand taste. 'These resemble a mixture of asolene and castor oil. This oil also rapidly turns rancid. A sample of such oil, treated by my process at 250 C. for 1 hours was found to be free from disagreeable odor and taste,

and had a sweet nutty flavor. It was also rendered stable.

I call attention to the fact that there i should be a free outlet provided in all cases,

iferous impurities from the oil under treatment. Mere agitation of the oil and hydrogen is not sufiicient. 'l he process comprises the step of distillinfg ofi' the impurities of the oil in a current 0 hydro en, and the temperature will vary with t e particular oil, impurities present, etc. Various temperatures between 100 and 300 C. have been found suitable with various oils, but it is obvious that the oil should in no case be heated so strongly asto injure the same, although it is to be noted that the oil, while being subjected to the action of a current of hydrogen, will stand being'heated to a somewhat higher temperature than could safely be employed, if other gases were used,-without developing a burnt taste.

I am aware that various other kinds of gases and vapors, such as air, steam, alcohol vapor and the like have been used in a similar manner for -purifying oils. Many of the impurities which are removed by my rocess cannot be removed b such agents, an moreover these agents a I tend to render the oil readily decomposable, whereas my process stabilizes the oil, and renders it less liable to decomposition than the raw oil treated.

found to be advisable to remove the air from the vessel abovethe oil, at the com mencement of the process, since under these conditions the oil is less liable to be injured by the heat. I

While there is a reduction of the iodin number of the oil during the treatment, and probably some hydrogenation takes place, the oil is nothardened in the general acceptation of the term.

What I claim is 1. A process of purifying fatty oils which comprises passing a current of gas consisting essentially of hydrogen, through the oil, at an elevated temperature,'in the absence of hydrogenating catalysts.

2. A process of purifying fatty materials which comprises distilling, in a current of hydrogen, at least a material proportion of the impurities which produce undesired odor and taste therein, said fatty materials being substantially free from hydrogenating catalysts.

3. A process which comprises maintaining a fatty oil at an elevated temperature, and then passing acurrent of a hydrog -contemperature of 100 C. to 300 0., and pass taining gas therethrough, without adding a 40 catalytically acting material thereto.

4. The process of purifying fatty oils by hydrogen distillation of at least a part of its impurities, in the. substantial absence of hydrogenating catalysts.

5. The step of distilling from a fatty oil,- in the absence of air and h drogenating catalysts, at least a portion of the impurities therein, in a current of hydrogen, at a temperature below that capable of injuring 5o the oil under treatment.

6. 'llhe herein described process which comprises maintaining a volume of a fatty 011 contalning malodorous ingredients, at a ing hydrogen gas therethrough, in the-absence of hydrogenating catalysts, and leading off the hydrogen gas carrying the vaporized malodorous ingredients.

7. In the purification of fatty oils, the herein described improvement comprising the removal of air from contact with the WALTER P. soHUoK. 

